<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card class="box-card">
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoles = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand" width="50">
          <template v-slot="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环，嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#" width="50"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300">
          <template v-slot="scope">
            <div>
              <el-button
                size="mini"
                type="primary"
                icon="el-icon-edit"
                @click="showEditRoles(scope.row.id)"
                >编辑</el-button
              >
              <el-button
                size="mini"
                type="danger"
                icon="el-icon-delete"
                @click="deleteRoles(scope.row.id)"
                >删除</el-button
              >
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)"
                >分配权限</el-button
              >
            </div>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRoles"
      width="50%"
      @close="addRolesClosed"
    >
      <el-form ref="addFormRef" :model="addForm" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoles = false">取 消</el-button>
        <el-button type="primary" @click="addR">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRoles"
      width="50%"
      @close="editRolesClosed"
    >
      <el-form ref="editFormRef" :model="editForm" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoles = false">取 消</el-button>
        <el-button type="primary" @click="editR">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree :data="rightList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
    },
    // 监听 【添加角色】 对话框关闭事件
    addRolesClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 监听 【编辑角色】 对话框关闭事件
    editRolesClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    async addR () {
      const { data: res } = await this.$http.post('roles', this.addForm)
      console.log(res)
      if (res.meta.status !== 201) return this.$message.error('添加角色失败！')
      this.rolelist.push(res.data)
      this.$message.success('添加角色成功！')
      this.getRolesList()
      // 隐藏添加角色对话框
      this.addRoles = false
    },
    // 点击按钮，编辑角色信息并提交
    async editR () {
      this.$refs.editFormRef.validate(async (valid) => {
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleId: this.editForm.roleId,
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败！')
        }
        this.editRoles = false
        this.getRolesList()
        // console.log(res)
        // 提示用户，编辑角色信息成功
        this.$message.success('编辑角色信息成功！')
      })
    },
    async showEditRoles (id) {
      this.editRoles = true
      const { data: res } = await this.$http.get(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色信息失败！')
      }
      this.editForm = res.data
    },
    // 根据ID删除对应的用户信息
    async deleteRoles (id) {
      // console.log(id)
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        '确认要删除此角色信息?',
        '温馨提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'error'
        }
      ).catch((err) => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消删除！')
      } else {
        // 发起删除角色信息请求
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) { return this.$message.error('删除用户数据失败') }
        this.$message.success('删除成功！')
        this.getRolesList()
      }
    },
    // 根据ID删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户，是=是否要删除对应的权限
      const confirmResult = await this.$confirm('你确定要删除此权限？', '温馨提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除！')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除角色权限失败！')
      role.children = res.data
      this.$message.success('删除角色权限成功！')
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取分配权限列表失败！')
      // 把获取到的权限数据，保存到 data 中
      this.rightList = res.data
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      // 如果node节点不包含children，则是三级权限
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.warning('角色授权失败！')
      this.$message.success('角色授权成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      addRoles: false,
      editRoles: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      editForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的id
      roleId: ''
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
  margin: 0 50px;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
